CVE-2026-68315Network attack vector

Kernel crash via oversized SCTP stream reset

Published Aug 10, 2026 · Updated Aug 10, 2026

Denial of service in affected Linux kernel versions from 4.11 allows remote attackers to crash the system through a crafted SCTP reset. sctp_process_strreset_inreq() derives a stream count from an incoming RESET_IN_REQUEST without ensuring the larger RESET_OUT_REQUEST fits in SCTP_MAX_CHUNK_LEN, causing a 16-bit size overflow and undersized skb allocation. Exploitation requires an SCTP association with stream reset enabled and an interface MTU above 65535, such as loopback with IPv6 jumbograms.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux kernel versions from 4.11 allows remote attackers to crash the system through a crafted SCTP reset. sctp_process_strreset_inreq() derives a stream count from an incoming RESET_IN_REQUEST without ensuring the larger RESET_OUT_REQUEST fits in SCTP_MAX_CHUNK_LEN, causing a 16-bit size overflow and undersized skb allocation. Exploitation requires an SCTP association with stream reset enabled and an interface MTU above 65535, such as loopback with IPv6 jumbograms.

The record

CVE
CVE-2026-68315
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.11
  2. Affected versionversion=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <00ae679cb21a035491fdad8d58dc6d79cc68b675
  3. Affected versionversion=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <18ae07691d43183d270de8be9dc8e027906015d9
  4. Affected versionversion=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <1a10fe1aa9c01f41b389a31906a77d538637c9d9
  5. Affected versionversion=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <6f0e39d180cd7cced647381b6fa14fd83d261047
  6. Affected versionversion=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <b255d8cd6cc68045ae9eecbac3b3c14e1f176c9b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <00ae679cb21a035491fdad8d58dc6d79cc68b675; version=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <18ae07691d43183d270de8be9dc8e027906015d9; version=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <1a10fe1aa9c01f41b389a31906a77d538637c9d9; version=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <6f0e39d180cd7cced647381b6fa14fd83d261047; version=7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137 <b255d8cd6cc68045ae9eecbac3b3c14e1f176c9b

Published CVSS scores

7.5LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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